Heavy duty scraper



APril 1940. M. M. BRODERSEN' ET AL 2,199,023

' HEAVY DUTY SCRAPER Original Filed April 6, 1936 2 Sheets-Sheet 1 April 30, 1940.

M. M. BRODERSEN Ei- AL HEAVY DUTY SCRAPER Original Filed April 6. 1936 2 Sheets-Sheet 2 Patented Apr. 30, 1940 PATENT OFFICE HEAVY DUTY SCRAPER Max M. Brodersen, Alhambra, and Len 0. Bird, Glendale, Calif., said Brodersen assignor to said Bird Original application April 6, 1936, Serial No. 72,934, now Patent No. 2,168,319, dated August Divided and this application June 7,

1939, Serial No. 277,951 v Claims.

This invention relates to earth handling apparatus of the type shown in our application for Letters Patent flled April 6, 1936, Serial No.

72,934, now Patent No. 2,168,319, and the pres- 6 ent application is a division of said earlier application.

One of the purposes of this invention is to provide an improved hauling scraper of the tiltable bowl, tiltable apron type, in which advantages l0 and improvements as to simplicity, ruggedness and durability of the entire scraper, as well as to nicety and positiveness of control and a quicker response and a greater flexibility of the operation of the bowl and apron, are made possible by 16 means of asingle cable operated mechanism for effecting and controlling operation of said bowl and said apron, and as a result of the particular relative arrangement and combination of the single cable mechanism, the scraper frame strucgo ture, bowl, apron and associated parts.

This combination makes it possible through appropriate manipulation of the single cable to instantly raise and lower the apron at will, without tilting or moving the bowl, and also makes it possible through further manipulation of same cable and while maintaining the apron under control of said cable, to move or tilt the bowl quickly or slowly and under great flexibility for loading, earth carrying, spreading, dumping and other purposes. Moreover this same cable controls the return movements of the bowl and apron and therefore, the manipulation of a single control lever or the like for operating the cable makes possible a greater number of operations and a greater nicety and flexibility of control of the apparatus as a whole than is possible where separate hydraulic and other types of independent devices are employed for independently I operating the bowl and apron. Such hydraulic and other operating devices as heretofore used have required the use of two hands to operate the bowl and scraper inasmuch as separate valves and tractor controls must be operated either simultaneously or in succession or the operator must release one control and grasp another and vice versa, in order to operate the implement as desired. With our scraper and its single cable control means, asingle control operated with one hand need not be let go of by the operator for 60 moving the bowl and apron relatively and exclutiltable apron operated by independent hydraulic devices, particularly the heavy duty types, the slowness of operation and lack of flexibility of said hydraulic devices and the necessity of separate operation thereof are disadvantageous in that part of the load may be lost if the bowl is in or is tilted to a position to gravitationally discharge the load orafter being loaded lifted to carrying position before the apron is in bowl closing or load retaining position, and this can and does often happen due to poor timing of the necessary operations and the slow response to the apron and bowl following the operators selective manipulation of a the separate controls. Thus, it is seen that a single cable operated means for controlling the bowl and apron in accordance with the provision of our invention, make possible a mode of operation and control and afiord advantages not possible with hydraulic and other separate or independent devices for operating the bowl and apron.

Another disadvantage of the hydraulic operating devices is the lack of flexibility thereof as compared to cable operated devices. A single cable operated mechanism is particularly advantageous in the tilting bowl, tilting apron combination of this invention, in that a quick "bang- ;ng movement of the bowl and apron and a vibratory action may be effected to dislodge wet dirt, mud, etc., clinging thereto due to the resiliency and flexibility of the cable and such resiliency and flexibility is impossible of achievement with the hydraulic devices.

With the foregoing and other objects in view, the invention hereof consists in the combination, correlation and construction of parts, elements and features which will be described in the following specification and finally pointed out in the claims hereto appended, it being understood that the apparatus of our invention is subject to modification. within the scope of said claims.

Figure 1 is a top plan view of a hauling scraper embodying our invention.

Figure 2 is a side elevation of the scraper.

Figure 3 is a side elevation showing the scraper in loading position.

Figure 4 is a side elevation showing the scraper Extending upwardly and forwardly from arms" Me at points adjacent the pivots I60 are members Ilc which are joined to brace members I extending from points on said arms adjacent the cross member I3c, upwardly and forwardly so as to terminate beyond the upper ends of members Me. Joined to and extending between the forward ends of the members I00, is a brace member I04 which carries a pair of forwardly extending arms I05 for supporting a pulley block 28c at-a point over the approximate center of the front section 20.

Mounted on the leg 50 are pulleys 29c and 3Ic of which the latter are swivelled. A cable 320 is dead ended as at 330 on a post I06 carried by the -member 4c and braced by members I01. This cable is reaved between a pulley block I9c on the post I06, and the pulley block 280, then passed over one idler 290, through the swiveled pulley 3Ic and extended therefrom for connection with a hoist on the tractor-in the usual manner.

Upon pulling on the cable 320, a block and tackle action takes place between pulleys I90 and 280 so that the rear section 30 is swung upwardly by turning on the axle Ilc. This efiects a knee action of the jointed sections of the frame whereby to raise the bowl 340 carried by the rear frame section. This bowl as here shown is pivoted as at 350 to points on the arms I00 adjacent but rearwardly of frame pivots I60. The sectional or jointed frame and bowl will gravitate to loading or carrying position as the case may be, upon releasing the cable 32a.

The bowl is maintained in carrying and loading positions by means of a spring detent device I08,

which releases incident to an intentional upward pull on the rear end of the bowl as will be hereinafter described.

4 An apron 480 is mounted adjacent the forward end of the bowl 340 so as to extend between the sides of the bowl for the usual cooperations with v the bowl and the scraping edge or blade 34d which is located adjacent the front of the bowl. The apron functions to retain the load in and release the load from the bowl and is scoop or bowl shaped. When lowered to position shown in Figure 3 the apron has its lowerside spaced above the scraper edge on blade 34d so that the dirt may readily enter the bowl, yet in this position will prevent the dirt from rolling forward out of the bowl. When in position shown in Figure 2 the apron closes the front end of the bowl. When in position shown in Figure 3 the apron is fully raised and the bowl upon being likewise raised will dump its .load.

As here provided arms 490 are fixed to the upper portion of the apron and'extend rearwardly and are pivoted as atv 50c to'the rear section 30 adjacent the rear side of the bowl or otherwise, provided the apron may be raised and lowered at will exclusively of the bowl.

" In accordance with this invention a single cable mechanism is provided for operating the bowl and includes a single cable 590 which is dead ended as at 110 (see Fig. 2) on the bowl 340. This cable is reaved between a pulley block 590 fixed on the bowl as shown in Fig. 2, and the pulley block I90, then reaved between block I9 and pulley blockv IiIc on the,, apron 48c, and iinally extended over andfunder pulleys of the blocks 2% and 3Ic respectively and thence to the tractor operated hoist not shown.

When a pulling force is exerted on cable 580 a block and tackle eifect takes place between I pulley blocks I90 and tile thereby first lifting the apron 48c which is lighter in weight than the justing the frame, or to vary the depth-of the blade 34d during loading, or to dump the load from the bowl; or so that the bowl will operate with a banging and vibrating action to dislodge mud and wet earth, etc., clinging thereto, all

under control of the single cable 580 which also v aifords full control and make possible movement of the apron as desired tocooperate with the bowl in its various operations.

When the cable 580 is released the bowl 34 is first gravitationally lowered exclusively of the apron to either a carrying or a loading p ition, or to other positions as desired, due to its having a greater weight than the apron. When thebowl is lowered to loading or carrying position, further releasing of the cable 58c will allow'the apron to gravitate into the desired or' its lowermost position dependent on the extent of slackening of said cable, it being noted that the apron comes under control of said cable immediately the bowl has been lowered.

It will now be seen that as a result of providing in a hauling scraper a bowl mounted on the scraper frame for movement relative theretojan apron mounted for movement exclusively of the bowl into and out of position for retaining the load in the bowl, and a means connected with the bowl, and apron, including asingle cable and operating when the cable is manipulated for moving the apron relative to the bowl and vice versa, we secure a flexibility of operation'and a nicety of control not heretofore possible in hauling scrapers and also eliminate manyof the objections which result in scrapers having fixed bowls or tilting bowls operated by hydraulic and devices other than a single cable means.

Another important provision of this invention is'that of mounting the fixed pulleys or pulley blocks for operating the bowl and apron forwardly of'both of said implements and on the front secon the rear sectionof the jointed vehicular. frame of the scraper. This simplifies and -makes' for an eflicient straight line pulley and cable system wherein a; great deal of friction is eliminated and the life of cable is appreciably increased.

llifeclairn: f 1. In a hauling scraper, a frame, a bowl mounted thereon for movement relative thereto. an apron mounted for movement exclusively of the bowl into and out of position for retaining the tion while the'bowl and apron are both mounted load in the bowl, and means connected with the bowl and apron including a single cable and operating when said cable is manipulated for moving the apron exclusively of the bowl and vice versa. 2. In a hauling scraper, a frame, a bowl mounted for movement relative to the frame, an apron mounted for movement exclusively of the bowl into and out of position for retaining the load in the bowl, and means connected with the bowl and apron including a single cable and operating when said cable is manipulated for moving the apron exclusively of the bowl and vice versa, said frame including pivotally connected front and rear sections on the rear section of which .the bowl and apron are supported, and means for effecting relative movement of said sections for bodily raising and lowering said bowl.

3. In a hauling scraper, a frame, a bowl mounted thereon for movement relative thereto, an apron mounted for movement exclusively of the bowl-into and out of position for retaining the load in the bowl, and means connected with the bowl and apron including a single cable and operating when said cable is manipulated for moving the apron exclusively of the bowl and vice versa, said frame including pivotally connected front and rear sections on the rear section of which said bowl and'apron are mounted, and means for effecting relative movement of said sections for bodily raising and lowering said sections including a pulley block on the front section, a pulley block on the rear section and a cable operatively associated with said pulley blocks, said single cable operated means including a pulley on said front section and a pulley on said apron around which said single cable is reaved.

4. In a hauling scraper, a frame, a bowl mounted thereon for movement relative thereto, an apron mounted for movement exclusively of the bowl into and out of position for retaining the load in the bowl, and means connected with the bowl and apron including a single cable and operating when said cable is manipulated for moving the apron exclusively of the bowl and vice versa, said frame including pivotally connected front and rear sections on the rear section of which the bowl and apron are supported, and means for effecting relative movement of said sections for bodily raising and lowering said bowl,

said single cable means including a pulley on the apron and a pulley on the front section of said frame, said two pulleys being moveable towards and away from one another in' a path extending upwardly and forwardly of the path of movement of said apron.

5. In a hauling scraper, a frame, a bowl mounted thereon for tilting movement relative thereto, an apron mounted for movement exclusively of said bowl into and out of position for retaining the load in the bowl, and means connected with said bowl and apron including a single cable and operating when said cable is pulled for first moving the apron exclusively of the bowl and then tilting said bowl 6. In a hauling scraper, a frame, a bowl mounted thereon for tilting movement relative thereto, an apron mounted for movement exclusively of said bowl into and out of position for retaining the load in the bowl, and means connected with said bowl and apron including a single cable and operating when said cable is pulled for first moving the apron exclusively of the bowl and then tilting said bowl, said frame including relatively movable front and rear sections, wheels supporting said sections, said bowl and apron being mounted on one of said sections and means for effecting relative movement of said sections for bodily raising and lowering said bowl.

'7. In a hauling scraper a wheel supported frame, a bowl mounted on the frame for movement relative thereto intoloading, carrying and dumping positions, a scraper blade associated with and for directing earth into said bowl, an apron mounted on said frame for movement into and out of position for retaining the load in said bowl, and operating-means including a single cable and members associated with the cable, frame, bowl and apron and initially operable when said cable is pulled, for moving the apron out of load retaining position exclusively of movement of said bowl and finally operable upon continuing the pull on said cable for moving the bowl into dumping position exclusively of movement of said apron, said operating means being initially operable upon releasing the cable to selectively position the bowl exclusively of said apron and finally operable upon further releasing the cable for disposing and maintaining the apron in load retaining or any position between the limits of movement thereof.

8. In a hauling scraper a wheel supported frame, a bowl mounted on the frame for movement relative thereto into loading, carrying and dumping positions, a scraper blade associated with and for directing earth into said bowl, an apron mounted on said frame for movement into and out of position for retaining the load in said bowl, and operating means including a single cable and members associated with the cable, frame, bowl and apron and initially operable when said cable is pulled, for moving the apron out of load retaining position exclusively of movement of said bowl and finally operable upon continuing the pull on said cable for moving the bowl into dumping position exclusively of movement of said apron, said operating means being initially operable upon releasing the cable to selectively position the bowl exclusively of said apron and finally operable upon further releasing the cable for d sposing and maintaining the apron in load retaining or any position between the limits of movement thereof, said frame comprising front and rear sections pivotally connected with one another, said bowl being mounted on said rear section, and means for effecting relative movement, of said sections for bodily raising and lowering the bowl.

9. In a hauling scraper a wheel supported frame, a bowl mounted on the frame for movement relative thereto into loading, carrying and dumping positions, a scraper blade associated with and for directing earth into said bowl, an apron mounted on said frame for movement into and out of position for retaining the load in said bowl, and operating means including a single cable and members associated with the cable, frame and apron, and initially operable when said cable is pulled for moving the apron out of load retaining position exclusively of movement of said bowl and finally operable upon continuing the pull on said cable for moving the bowl into dumping position exclusively of movement of said apron, said operating means being initially operable upon releasing the cable to selectively position the bowl exclusively of said apron and finally operable upon further releasing the cable for disposing and maintaining the apron in load retaining or any position between the limits of movement thereof, said frame including pivotally controlled front and rear sections of which 1 the rear section supports the bowl and apron, means for eifecting relative movement of said sections for simultaneously and bodily raising and lowering the bowl and apron.

10. In a hauling scraper a wheel supported frame, a bowl mounted on the frame for movement relative thereto into loading, carrying and dumping positions, a scraper blade associated with and for directing earth into said bowl, an apron mounted on said frame for movement into and out of position for retaining the load in said bowl, an operating means including a single cable and members associated with the cable, frame, bowl and apron and initially operable when said cable is pulled for moving the apron out of load retaining position exclusively of movement of said bowl and finally operable upon continuing the pull on said cable for moving the bowl into dumping position exclusively of movement of said apron.

MAX M. BRODERSEN.

LEN 0. BIRD. 

